Sampled by both Kanye West and Tyler, The Creator. Such a sonically sweeping track that really doesn't get enough love. Feels like I'm soaring every time I spin it. Had the pleasure of learning it on the ivory keys myself.
I like your description of "songs without words" - I've probably written some myself (including Memories in the Wind), but never exactly thought of them that way.
Based on your sweet little banjo "song" posted, I think you might enjoy this cheerful tune composed by my friend, Mike Long, while he was driving along the road to Hana. I lived on Maui for 3 months and never traveled that road, so this is how I experience it vicariously...
I'll put a couple from different genres, though I don't know if these are my absolute favorite ones, but they are very close to the top. The first one is probably the first instrumental song that I was introduced to, and is by my favorite rock band, so it might be.